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CBSE Class 12-science Answered

when0.5g Nacl present in 1000g of water then calculate the freezing point of solution ? kf= 1.7k kg /mol
Asked by lakashitaparihar801 | 30 Apr, 2019, 04:31: PM
answered-by-expert Expert Answer
Depressio in freezing point can be calculated by-
increment straight T subscript straight f space end subscript equals straight m cross times straight k subscript straight f Initial space freezing space point space equals 0 degree straight C Final space freezing space point equals straight T degree straight C space space space space left parenthesis 0 minus straight T right parenthesis space space space equals fraction numerator 0.5 cross times 1000 over denominator 58.4 cross times 1000 end fraction cross times 1.7 space space space space space space space space space straight T equals negative 0.01455 space space degree straight C
Answered by Ravi | 30 Apr, 2019, 05:47: PM

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CBSE 12-science - Chemistry
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To 500 cm3of water ,3×10^-3 of acetic acid is added .if 23 percent is dissociated  what will be the depression in freezing pt given k1 is 1.86K kg /mol 
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